More than a decade has passed since Florida Power & Light asked customers to pay all of the company’s costs from a big hurricane, but the scrutiny of this request should be just as thorough.

FPL wants the Public Service Commission to let it assess customers $1.3 billion for the cost of restoring power after Hurricane Irma. FPL spokesman David McDermitt said the number is preliminary. At that amount, the monthly increase for the average residential customer who uses 1,000 kilowatt hours would be $4, rising to $5.50, through 2020.

Many homeowners, though, use more electricity than that. The surcharge would fall hardest on business customers. The surcharge would start in March, one month after the surcharge for Hurricane Matthew expires.

In an interview with the Sun Sentinel Editorial Board, McDermitt said FPL didn’t have many specifics yet. The company arrived at $1.3 billion “based on our experience.” He predicted FPL would file its request with the PSC by the end of the year.

It’s worth noting that the company didn’t file its justification for last year’s Hurricane Matthew expenses until two weeks ago, even though customers have been paying a surcharge for those costs for months. There still must be a hearing, as there will be for the Irma surcharge.

Six weeks after Hurricane Irma, a sharper picture is emerging of how South Florida could better prepare for the next big storm.

To add clarity, the Sun Sentinel Editorial Board surveyed 36 mayors in Broward and Palm Beach counties to ask what went right during Irma and what needs work. Twenty responded...

(Sun Sentinel Editorial Board)

Most of the Irma costs, McDermitt said, relate to “restoration.” Nearly 20,000 non-FPL workers helped get power back on. Restoration costs also include material, such as poles. Other expenses will be for repairs to the grid, which McDermitt said “held up well.” There was comparatively little rebuilding, most of which has been completed.

Regulators, however, should ask why Irma did so much damage after FPL invested nearly $3 billion to harden the grid since the 2004 and 2005 hurricane seasons. In October 2005, Wilma cut power to 3.2 million of FPL’s then-4.3 million customers — or roughly 75 percent. FPL now has 4.9 million customers, and 4.4 million lost power after Irma — nearly 90 percent.

McDermitt argues that regulators should evaluate FPL not on how many customers lost power, but on how quickly they got it back on. After Wilma, he said, the average wait was five days and the longest was 18 days. After Irma, the average wait was two days and the longest was 10 days. Wilma, McDermitt said, took down roughly 12,000 poles. Irma took down about 2,500.

As with bills, however, FPL is asking regulators to accept how it frames the story. Yes, bills are comparatively low, but could they be even lower? Yes, the post-Irma response was better than the post-Wilma response, but could it have been better still? And why did so many customers lose power outside of where Irma’s highest winds hit? Was enough preparation done?

FPL also could lessen the impact of the Irma surcharge by selling bonds. The company did that for its costs from the 2004 and 2005 seasons. That surcharge has lasted longer — it will end in 2019 — but the amount was just $1.05 per month for the average residential customer.

McDermitt said FPL wouldn’t issue bonds for Irma reimbursement, based on its rate case settlement last year. The Public Service Commission can’t order FPL to securitize the cost, but commissioners can ask about the company’s decision.

So, too, should commissioners ask FPL why the company didn’t let city tree-trimming crews help clear paths for utility workers. Doing so would have reduced the need for crews that make time-and-a-half as soon as they hit the road, and who came from as far away as Canada.

In 2006, FPL asked the commission for $1.7 billion related to the 2004 and 2005 hurricanes. The issue was whether FPL’s lack of maintenance contributed to the damage. The review was detailed enough to include faulty bolts that caused the collapse of a transmission line in western Palm Beach County.

That Public Service Commission cut $600 million from FPL’s request, going with the staff recommendation. More recently, however, the staff and commission have consistently sided with FPL.

Based on history, regulators should be skeptical of the company’s claim that anything less than full reimbursement would hurt the company’s ability to attract investors.

After that 2006 ruling and the commission’s 2010 rejection of a rate increase, FPL executives warned that the company might not be able to raise capital. Yet the stock price of FPL’s parent company, NextEra Energy, has increased nearly 400 percent in the last 11 years, trading this week over $150. The current rate agreement guarantees FPL a profit of between 9.6 percent and 11.6 percent.

Nor would any of the Irma reimbursement go toward improving a communication system that basically failed customers and communities. McDermitt, though, said, “We are all over it.”

Customers have benefited from the regulated monopoly system under which FPL has invested in modern plants. That system goes out of balance, however, if utilities can assume their customers will pay for any mistakes. With Irma, the commission should not presume that FPL is blameless.

Editorials are the opinion of the Sun Sentinel Editorial Board and written by one of its members or a designee. The Editorial Board consists of Editorial Page Editor Rosemary O'Hara, Elana Simms, Andy Reid, Deborah Ramirez and Editor-in-Chief Howard Saltz.